package com.szs.mapper;

import com.szs.pojo.Dept;
import org.apache.ibatis.annotations.*;

import java.util.List;
import java.util.Optional;

@Mapper
public interface DeptMapper {
    /*
     *查询所有部门数据
     */
    //方法一：手动结果映射mybatis无法自动封装的列
   /* @Results({
            @Result(column = "create_time", property = "createTime"),
            @Result(column = "update_time", property = "updateTime")
    })*/
    //方式二：起别名
    //@Select("select id, name, create_time createTime, update_time updateTime from dept order by update_time desc")
    @Select("select id, name, create_time, update_time from dept order by update_time desc")
    List<Dept> findAll();

    //根据ID删除部门
    @Delete("delete from dept where id =#{id}")
    void deleteById(Integer id);
    //新增部门
    @Insert("insert into dept( name, create_time, update_time) values (#{name},#{createTime},#{updateTime})")
    void insert(Dept dept);
    //根据ID查询部门数据
    @Select("select id, name, create_time, update_time from dept where id= #{id}")
    Dept getById(Integer id);

    //更新部门
    @Update("update dept set name = #{name} ,update_time= #{updateTime} where id = #{id}")
    void update(Dept dept);
    /*
    * 根据id删除部门
    * */
    Optional<Dept> findById(Integer id);
}
